Automatic draft-regulator



(No Model.)

G. E. DIXON. AUTOMATIC DRAFT REGULATOR. No. 397,173. Patented Feb. 5, 1889.

W/T/VESSES: IIVVE/VTOH,

W W 5 5 7 A/ Q. d$$ BY ATTORNEY,

' of which the following is a speci UNITED STATES 1PATENT.FFKCE.

GEORGE E. DIXON, OFUHICAGO, lLLlNOlS.

AUTOMATIC DRAFT-REG u LATOR.

SPECIFICATION formingpart. of Letters Patent No. 397,173, dated February 5,1889. Application filed October 22, 1887, Renewed December 24, 188 8. Serial Nol 294,565. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE DIXON, a subjectof the Queen of Great Britain, a citizen of England, anda resident of Chicago, county of Cook, and State of Illinois, have invented new and useful Improvements in Automatic Regulators for llot-lVater Ileating Apparatus,

tication, reference being had to the accompanying draw- IO ings, illustrating the invention, in which "2o cylinder (1, with the other 3o phragm is formed with flan Figure I is a vertical longitudinal section of my improved regulator; Fig. II, a horizon-' tal section of the same on line Zr, Fig. I.

This invention relates to an improvement in regulators for automatically controlling the temperature in hot water heating apparatus; and, in brief, the invention consists of three principal pa1tsviz., the expansion-chamber A, the circulati ng-chainber B, and diaphragmmechanism shown in connection with the diaphragm-cylinder u.

b represents the piston which operates therein, and (Z is the piston-guide extending below the piston.

e e is the corrugated flexible tube, which is made of rubber or other suitable material to form what is known as a bellows diaphragm, which may be elongated and depressed under thd piston bl The bellows diaged ends,'thc upper flange being secured between the annular plate 9 and the piston I), and the lowerflange secured between a flange, f, and the top of chamber B,so as to prevent the escape of air or gas. The plate'f is brought down .onto the flange of the diaphragm bythe cyl inder a being screwed downinside of a flange, (J, projecting up from the top ofthe chamber B. By this means the piston (Z may fitclosely in cylinder (1., to prevent any substance from lodging between the cyli'nderandbellows dia phragm. and preventing a free action of the mechanism. Metal rings is kare placed around the diaphragm'at its narrowest portionsto give it the'required strength. Post-s D E are projected up from. the top of chain- 'ioer Branda lever, F, is pivoted to post D, and the post E, by meajns'of a slot, Z, guides the lever in its oscillating movements The piston-rod G, by-means of a slot in its top por-.

.tion, connects with and operates the lever F,

and'the lever, bein weighted at 0 0 0, will not be raised till a certain *known. pressure is attained. A chain, 11 n, or other connection may be had. \\'ith a damper or valve which is to be regulaiwl.

'V is a regulating-valve, which communicates with the expansion-chamberA, and it is employed to regulate the pressure therein. The eXpansion-chaml)cr is inclosed in a circulating-chamber, l3, and it communicates with the diaphragm-chaniberin cylindcra by the screw-nipple 71 71.

(-ommunication is attained between my regulator and a hot-water heating apparatus by flow and return pipes, which are to'be con nected steam-tight with the ports 1) p. Such pipes allow-of a continuous circulation of the water in the heating, apparatus through the circulating-chamber P),- and the motive power of my regulator is obtained by this circulation.

The essential feature of my invention-is the expansionrchamberA, inolosed in the cirthe chain attachment a n. The water in the circulating-chamber B, being heated, will expandthe air in chamber A and rais the pietonb,.and by means of its rod G the Fever F will be raised to close a damper, as may be required to regulate the heat in the furnace, as soon as a fire. isstarted and the water in the oirculating-chamber becomes tocirculate.

I'do not claim anything new in regulating the heat in a-furnace independent of the construction of particularly novel features for regulating the temperature of hot-water heaters, and therefore confine myself to the elements claimed. I I

I claim as new and desire to secure by Letters Patent sufficiently hot This will Ice In a heat regulator, the combination of the v 'beliowsdiaphragmeeand thechaniberA, c-omdiaphragm is attached, as and for the purmunicating with it, the cylinder (1', surroundpose specified. .ing the bellowsdiaphragm, the piston 11, and

piston-rod G, and the piston provided'with a GEORGE N? cock, V, and also with an annular guide, 61,. \Viinesses: which closely fits the inside of said cylinder G. L. CHAPIN, and to which the Top portion of the bellows II. A. SMITH. 

